ViewSonic VS11755 Manuale utente

ViewSonic VA1916w

Model No. VS11755

19 ColorTFT LCD Display

(Manufacturedate:Dec.2008)

ServiceManual

transmitted, transcribed,stored inaretrievalsystem,ortranslated intoanylanguage orcomputerlanguage,in any

formorbyanymeans,electronic,mechanical,magnetic,optical,chemical,manualorotherwise,withoutthe prior

written permission ofViewSonicCorporation.

Disclaimer

ViewSonicmakesno representationsorwarranties, eitherexpressed orimplied, withrespect tothe contentshereof

and specificallydisclaimsanywarrantyofmerchantabilityorfitness foranyparticularpurpose.Further,ViewSonic

reservesthe righttorevisethispublication and tomakechangesfromtimetotimeinthe contentshereofwithout

obligation of ViewSonictonotifyanyperson ofsuchrevision orchanges.

Trademarks

Optiquest isaregistered trademarkofViewSonicCorporation.

ViewSonicisaregistered trademark of ViewSonicCorporation.

Allothertrademarksused withinthisdocumentarethe propertyoftheirrespectiveowners.

Productdisposalatendofproductlife

The lampinthisproduct containsmercury. Pleasedisposeofinaccordancewithlocal, stateorfederal laws.

Revision History

Revision

SM Editing Date ECR Number DescriptionofChanges Editor

InitialRelease

T96MRYDBIWVSNNN

T96MRYDDIWVWNND

A01 Dec9, 08

T96MRYDDIWVWNNN

TABLEOFCONTENTS

1. PrecautionsandSafetyNotices..........................................................................................3

2. Specification.......................................................................................................................5

3. FrontPanel FunctionControl Description .......................................................................7

4. CircuitDescription.............................................................................................................14

5.AdjustingProcedure..........................................................................................................15

6.TroubleShooting Flow Chart............................................................................................22

7. Block Diagrams.................................................................................................................23

8. SchematicDiagrams........................................................................................................25

9. PCB LayoutDiagrams......................................................................................................32

10. ExplodedDiagramandSparePartsList.........................................................................39

11. RecommendedSparePartsList....................................................................................44

12. Differentpartslist........................................................................................................... 70

1. PrecautionsandSafetyNotices

Precautionsandsafetynotices

1.1safetyprecautions

Thismonitorismanufactured and tested on aground principlethat auser’ssafetycomesfirst. However,improperuse

orinstallationmaycausedamage tothe monitoraswell asthe user. Carefullygo overthe following WARNINGS

beforeinstalling and keep thisguide handy.

1.2WARNINGS

Thismonitorshouldbe operated onlyatthe correct powersourcesindicated on the labelon the rearendofthe

monitor.If you’reunsureofthe powersupplyinyourresidence, consult you local dealerorpowercompany.

Useonlythe specialpoweradapterthatcomeswiththismonitorforpowerinput.

Do nottry torepairthe monitoryourselfasitcontainsno user-serviceableparts.Thismonitorshouldonlybe repaired

byaqualified technician.

Do notremovethe monitorcabinet.Thereishigh-voltage partsinside thatmaycauseelectricshock tohuman bodies,

even when the powercordisunplugged.

Stopusing the monitorif thecabinetisdamaged.Haveitchecked byaservicetechnician.

Putyourmonitoronlyinaclean, dryenvironment. If it getswet, unplug the powercableimmediatelyand consult your

servicetechnician.

Alwaysunplug the monitorbeforecleaning it.Clean the cabinetwithaclean,dry cloth.Applynon-ammoniabased

cleanerontothe cloth, not directlyontothe glass screen.

Keep the monitorawayfrommagneticobjects,motors,TVsets, and transformer.

Do notplaceheavyobjectson the monitororpowercord.

1.3 Productsafetynotice

Manyelectricaland mechanicalpartsinthischassishavespecial safetyvisualinspectionsand the protection afforded

bythemcannotnecessarilybe obtained byusing replacementcomponentsrated forhighervoltages, wattage,etc.

Beforereplacing anyof thesecomponentsread the partslistinthismanual carefully.The useof substitute

replacement partswhichdo not havethe samesafetycharacteristicsasspecified inthe partslistmaycreateshock,

fire,orotherhazards.

1.4 Service notes

Whenreplacing partsorcircuit boards, clampthe lead wiresaroundterminalsbeforesoldering.

Whenreplacing ahigh wattage resistor(morethan 1Wofmetal oxide filmresistor) incircuitboard, keep the resistor

about 5mm awayfromcircuit board.

Keep wiresawayfromhigh voltage, high temperaturecomponentsand sharpedges.

Keep wiresintheiroriginal position soastoreduceinterference.

Usage ofthisproduct pleaserefertoalsouser’smanual.

CorrectMethodsIncorrectMethods

Onlytouchthe metal-frameofthe panelorthe

front coverofthe monitor.

Do not touchthe surfaceofthe polarizer.

Surfaceof the panelispressed byfingersand that

maycause “MURA “

Takeout the monitorfromcarton. Takeout the monitorbygrasping theLCD panel.

Thatmaycause “MURA“.

Placethe monitoron aclean &soft foampad . Placethe monitoron foreign objectsand

that couldscratchthe surfaceof panel.

2. Specification

2.1Productspecifications

Product Name VA1916w

OracleP/N VA1916W-10

ModelNumber VS11755

OSDLanguages: 11

English,French,German,Italian, Spanish,

Finnish, Japanese, Russian Simplified Chinese,

TraditionalChinese, Korean

TFTLCD Panel and Model # 1st panel:CMOA190A2

Scalar RTD2554VH

Input Signal Analog x1

SyncCompatibility SeparateSync

Adapter InternalPowerBoard

PowerCable Yes,

refertoAPPENDIXB:PowerCable

Analog Cable(1.8m,black), withPC2001 and HotPlug

Detect &DDC Yes

(Detached cable; refertheAppendixA)

DVI-DCable(1.8m,black)withPC2001 NO

AudioCable(1.8m, black)withPC2001 NO

MICCable(1.8m,black)withPC2001 No

USB Cable(V2.0) No

ViewSonicCD Wizard

Arabic,English,Finnish, Spanish, German,

Italian, Japanese, Swedish, Polish, Korean,

Portuguese, Russian,Turkish, French,Czech,

Hungarian, Simplified Chinese,Traditional

Chinese. Greek, Dutch,Bulgarian, Croatian,

Romanian, Serbian, Slovak, Slovenian

ViewSonicQuickStartGuide One Page

PerfectSuiteCD No

Screen ProtectorMylar Yes

Foot Protectorplastic No

BaseassemblyProcedureCard Yes

Energystart sticker Yes

VistaInstall CardYes

DCR Sticker Yes

ServiceInsert ForRegion code =Munitsonly

WarrantyCard ForRegion code =Gunitsonly

Carton Sticker ForRegion code =Gunitsonly

PE bag ofCarton NO

Manufactureaddress sticker ForRegion code =Gunitsonly

2.2Interface description

1 5

610

11 15

VideoConnectorPinAssignment

A-1.15 pinD-subconnectorpinassignment

PinNumber

PinFunction

1 Red video input

2 Green videoinput

3 Blue videoinput

4 NoConnection

5 Ground

6 Red video ground

7 Green videoground

8 Blue videoground

9 +5V

10 H/Vsyncground

11 Noconnection

12 (SDA)

13 Horizontalsync(Compositesync)

14 Verticalsync

15 (SCL)

3. FrontPanel FunctionControl Description

Usethe buttonson the front control paneltodisplayand adjust the OSDcontrolswhichdisplay

on the screen. The OSDcontrolsareexplained atthe top of the next page and aredefined in

“MainMenu Controls”

MainMenu

withOSDcontrols

FrontControlPanel

shownbelowindetail

Displaysthe control screen

forthehighlightedcontrol.

Alsotogglesbetweentwo

controlsonsomescreens.

AlsoashortcuttoAuto

Image Adjust.

Displaysthe

MainMenu or

exitsthe

controlscreen

and saves

adjustments.

Powerlight

Blue =ON

Orange =PowerSaving

StandbyPower

On/Off

Scrollsthrough

menu optionsand

adjuststhe

displayed control.

Alsoashortcut to

displaythe

Contrast

adjustmentcontrol

screen.

Do thefollowingtoadjustthedisplay setting:

1. Todisplaythe MainMenu,press button [1].

NOTE: AllOSDmenusand adjustment screensdisappearautomaticallyafterabout 15

seconds. Thisisadjustablethrough the OSDtimeoutsettinginthe setup menu.

2. Toselect acontroltoadjust, press ortoscrollup ordown inthe MainMenu.

3. Afterthe desired controlisselected, press button [2].Acontrol screen likethe one shown

belowappears.

The line atthe bottomofthe screen shows

the currentfunctionsof buttons1and 2:

Exit orselect the Brightness control.

4. Toadjust thecontrol, press the up ordownbuttons.

5. Tosavethe adjustmentsand exit themenu, press button [1] twice.

Thefollowing tipsmay help youoptimizeyourdisplay:

•Adjust the computer'sgraphicscardsothatit outputsa1440 x900 @60Hzvideo signalto

the LCD display.(Lookforinstructionson “changing therefreshrate”inthe graphicscard's

userguide.)

•If necessary, makesmalladjustmentsusing H. POSITIONand V.POSITIONuntilthe

screen image iscompletelyvisible. (The blackborderaround the edge of the screen should

barelytouchthe illuminated “activearea”of the LCD display.)

MainMenu Controls

Adjust the menu itemsshownbelowbyusing the up and downbuttons.

Control Explanation

Auto ImageAdjust automaticallysizes, centers, and fine tunesthe video signal

toeliminatewaviness and distortion. Press the [2] buttontoobtainasharper

image.

NOTE: AutoImage Adjust workswithmost commonvideo cards. Ifthis

functiondoesnot work on yourLCD display,then lowerthe video refreshrate

to60 Hzand set theresolution toitspre-setvalue.

Contrast adjuststhe differencebetween the image background (black level)

and the foreground (whitelevel).

Brightness adjustsbackground black level of the screen image.

ColorAdjust providesseveral coloradjustmentmodes,including preset color

temperaturesand aUserColormode whichallowsindependent adjustment of

red (R), green (G),and blue (B).The factorysetting forthisproductis6500K

(6500 Kelvin).

sRGB-Thisisquicklybecoming the industry standardforcolormanagement,

withsupport being included inmanyof the latest applications. Enabling this

setting allowsthe LCD displaytomoreaccuratelydisplaycolorsthe waythey

wereoriginallyintended. Enabling the sRGBsetting will causethe Contrast and

Brightness adjustmentstobe disabled.

9300K-Addsblue tothe screen image forcoolerwhite(used inmost office

settingswithfluorescentlighting).

6500K-Addsred tothe screen imageforwarmerwhiteand richerred.

5400K-Addsgreen tothe screen image foradarkercolor.

User Color Individualadjustmentsforred (R), green (G), and blue (B).

1. Toselect color(R,G orB) press button [2].

2. Toadjust selected color,press and.

Important: If you selectRECALL fromtheMainMenu whenthe productisset

toaPresetTiming Mode, colorsreturntothe 6500Kfactory preset.

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